随着网络技术的迅猛发展，计算机的应用领域日益扩张，随之也产生了不少网络安全问题。在很多企事业单 位，计算机的网络安全问题所引发的事故不在少数。许多计算机虽然在防火墙等安全措施的保护下免遭外界风险的干扰，但 是往往无法控制内部安全隐患的出现。本文设计出一套全新的基于协议解析的网络安全审计系统，能够对内网安全提供有力 技术服务。

With the rapid development of network technology, the application of computer is increasingly expanding, and it also produces a lot of network security issues. There are not a few accidents caused by computer network security problems. Although many computers can escape from the external risk of interference under the protection of firewall and other security measures, they can’t control the emergence of internal security risks. This paper designs a new network security audit system based on protocol analysis, which can provide powerful technical services to network security.